Found 1 items, similar to Equation of time.
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Definition: Equation of time
, n.; pl. Times
. [OE. time, AS. t[=i]ma, akin to
t[=i]d time, and to Icel. t[=i]mi, Dan. time an hour, Sw.
timme. [root]58. See Tide
1. Duration, considered independently of any system of
measurement or any employment of terms which designate
limited portions thereof.
The time wasteth [i. e. passes away] night and day.
I know of no ideas . . . that have a better claim to
be accounted simple and original than those of space
and time. --Reid.
2. A particular period or part of duration, whether past,
present, or future; a point or portion of duration; as,
the time was, or has been; the time is, or will be.
God, who at sundry times and in divers manners spake
in time past unto the fathers by the prophets.
--Heb. i. 1.
3. The period at which any definite event occurred, or person
lived; age; period; era; as, the Spanish Armada was
destroyed in the time of Queen Elizabeth; -- often in the
plural; as, ancient times; modern times.
4. The duration of one's life; the hours and days which a
person has at his disposal.
Believe me, your time is not your own; it belongs to
God, to religion, to mankind. --Buckminster.
5. A proper time; a season; an opportunity.
There is . . . a time to every purpose. --Eccl. iii.
The time of figs was not yet. --Mark xi. 13.
6. Hour of travail, delivery, or parturition.
She was within one month of her time. --Clarendon.
7. Performance or occurrence of an action or event,
considered with reference to repetition; addition of a
number to itself; repetition; as, to double cloth four
times; four times four, or sixteen.
Summers three times eight save one. --Milton.
8. The present life; existence in this world as contrasted
with immortal life; definite, as contrasted with infinite,
Till time and sin together cease. --Keble.
9. (Gram.) Tense.
10. (Mus.) The measured duration of sounds; measure; tempo;
rate of movement; rhythmical division; as, common or
triple time; the musician keeps good time.
Some few lines set unto a solemn time. --Beau. &
Note: Time is often used in the formation of compounds,
mostly self-explaining; as, time-battered,
time-beguiling, time-consecrated, time-consuming,
time-enduring, time-killing, time-sanctioned,
time-scorner, time-wasting, time-worn, etc.
, time irrespective of local standards or
epochs; as, all spectators see a lunar eclipse at the same
instant of absolute time.
, the time of day reckoned by the sun, or so
that 12 o'clock at the place is the instant of the transit
of the sun's center over the meridian.
, mean solar time reckoned by counting the
hours continuously up to twenty-four from one noon to the
, at distinct intervals of duration; now and then;
as, at times he reads, at other times he rides.
, time as reckoned for the purposes of common
life in distinct periods, as years, months, days, hours,
etc., the latter, among most modern nations, being divided
into two series of twelve each, and reckoned, the first
series from midnight to noon, the second, from noon to
(Mil.), the ordinary time of marching, in which
ninety steps, each twenty-eight inches in length, are
taken in one minute.
Equation of time
. See under Equation
(a) In good season; sufficiently early; as, he arrived in
time to see the exhibition.
(b) After a considerable space of duration; eventually;
finally; as, you will in time recover your health and
. See under 4th Mean
(Mil.), time of marching, in which one hundred
and twenty steps, each thirty inches in length, are taken
in one minute.
. See under Sidereal
, the civil time that has been established by
law or by general usage over a region or country. In
England the standard time is Greenwich mean solar time. In
the United States and Canada four kinds of standard time
have been adopted by the railroads and accepted by the
people, viz., Eastern, Central, Mountain, and Pacific
time, corresponding severally to the mean local times of
the 75th, 90th, 105th, and 120th meridians west from
Greenwich, and being therefore five, six, seven, and eight
hours slower than Greenwich time.
, a ball arranged to drop from the summit of a
pole, to indicate true midday time, as at Greenwich
Observatory, England. --Nichol.
(Com.), a contract made for the sale or
purchase of merchandise, or of stock in the public funds,
at a certain time in the future.
. Same as Time-table
, a book in which is kept a record of the time
persons have worked.
, a timepiece provided with a device for
registering and indicating the exact time when a watchman
visits certain stations in his beat.
, in season; early enough. “Stanly at Bosworth
field, . . . came time enough to save his life.”
, a fuse, as for an explosive projectile, which
can be so arranged as to ignite the charge at a certain
definite interval after being itself ignited.
, or Time out of mind
. (Eng. Law) See
, a lock having clockwork attached, which, when
wound up, prevents the bolt from being withdrawn when
locked, until a certain interval of time has elapsed.
Time of day
, salutation appropriate to the times of the
day, as “good morning,” “good evening,”
and the like;
To kill time
. See under Kill
, v. t.
To make time
(a) To gain time.
(b) To occupy or use (a certain) time in doing something;
as, the trotting horse made fast time.
To move against time
, To run against time
, or To go against time
, to move, run, or go a given distance without a
competitor, in the quickest possible time; or, to
accomplish the greatest distance which can be passed over
in a given time; as, the horse is to run against time.
(a) Mean time as kept by a clock going uniformly.
(b) (Astron.) Apparent time as reckoned from the transit
of the sun's center over the meridian.
, n. [L. aequatio an equalizing: cf. F.
['e]quation equation. See Equate
1. A making equal; equal division; equality; equilibrium.
Again the golden day resumed its right,
And ruled in just equation with the night. --Rowe.
2. (Math.) An expression of the condition of equality between
two algebraic quantities or sets of quantities, the sign =
being placed between them; as, a binomial equation; a
quadratic equation; an algebraic equation; a
transcendental equation; an exponential equation; a
logarithmic equation; a differential equation, etc.
3. (Astron.) A quantity to be applied in computing the mean
place or other element of a celestial body; that is, any
one of the several quantities to be added to, or taken
from, its position as calculated on the hypothesis of a
mean uniform motion, in order to find its true position as
resulting from its actual and unequal motion.
. See under Absolute
, or Equational box
, a system of differential
gearing used in spinning machines for regulating the twist
of the yarn. It resembles gearing used in equation clocks
for showing apparent time.
Equation of the center
(Astron.), the difference between
the place of a planet as supposed to move uniformly in a
circle, and its place as moving in an ellipse.
Equations of condition
(Math.), equations formed for
deducing the true values of certain quantities from others
on which they depend, when different sets of the latter,
as given by observation, would yield different values of
the quantities sought, and the number of equations that
may be found is greater than the number of unknown
Equation of a curve
(Math.), an equation which expresses
the relation between the co["o]rdinates of every point in
Equation of equinoxes
(Astron.), the difference between the
mean and apparent places of the equinox.
Equation of payments
(Arith.), the process of finding the
mean time of payment of several sums due at different
Equation of time
(Astron.), the difference between mean and
apparent time, or between the time of day indicated by the
sun, and that by a perfect clock going uniformly all the
or Equation watch
, a timepiece made to
exhibit the differences between mean solar and apparent
solar time. --Knight.
. See under Normal
(Astron.), the difference between an
observed result and the true qualities or peculiarities in
the observer; particularly the difference, in an average
of a large number of observation, between the instant when
an observer notes a phenomenon, as the transit of a star,
and the assumed instant of its actual occurrence; or,
relatively, the difference between these instants as noted
by two observers. It is usually only a fraction of a
second; -- sometimes applied loosely to differences of
judgment or method occasioned by temperamental qualities
Theory of equations
(Math.), the branch of algebra that
treats of the properties of a single algebraic equation of
any degree containing one unknown quantity.